PRODUCT DATA SHEET P3324 LOW COST LINE MATCHING TRANSFORMER Features Applications ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ Low Cost 12.6mm (0.5”) Seated Height Industry Standard Pinout IEC 950, UL 1950 and EN 60950 Certified UL Recognized Component BABT Certificate of Recognition Extended Frequency Response Flat TX and RX Responses Simple Matching Low Insertion Loss High Thermal Stability Voice V.22bis Modems Set Top Boxes Least Cost Routers Instrumentation DESCRIPTION P3324 is intended for low speed data and voice applications where good distortion at moderate power levels is required at a most competitive price. P3324 uses patented design and construction methods to achieve excellent signal performance and safety isolation to international standards at truly low cost, making it the component of choice for voice and low speed data applications throughout the world. P3324 is certified to EN 60950, IEC 950, UL1950 and EN 41003. P3324 is a UL Recognized Component, and is supported by a BABT Certificate of Recognition and an IEC CB Test Certificate. P3324 has exceptionally flat frequency response from 100Hz to 10kHz, a 3dB bandwidth of over 50kHz and requires only the very simplest of matching to achieve good return loss and transhybrid loss across the voiceband, with low levels of signal distortion at signal frequencies as low as 200Hz. P3324 also exhibits stable electrical characteristics over its full operating temperature range. Patented E203175 ETALDOC 597/4 Page 1 of 5 September 2000 P3324 SPECIFICATIONS Electrical At T = 25OC and as circuit Fig. 2 unless otherwise stated. Parameter Conditions Min Typ Max Units Insertion Loss f = 2kHz, RL = 600Ω - 1.8 - dB Frequency Response LF -3dB cutoff HF -3dB cutoff 200Hz – 4kHz - 30 55 - ±0.1 Hz kHz dB Return Loss(5) 200Hz – 4kHz 16 - - dB Transhybrid Loss(5) 200Hz – 4kHz 20 - - dB Third Harmonic Distortion(1) 450Hz -10dBm in line 200Hz -10dBm in line - -86 -79 - dBm dBm Voltage Isolation(2) 50Hz DC 2.12 3.0 - - kVrms kV 0 -40 - +70 +85 70 95 - 87 120 Ω Ω 3 3.8 5 mH Operating Range: Functional Storage O C C O Lumped equivalent circuit parameters as Fig. 1 DC resistance (3) Primary resistance RDCp Secondary resistance RDCs Leakage inductance, ∆L Shunt inductance, Lp(4) 200Hz -43dBm 3 4 - H Shunt loss, Rp 200Hz -43dBm 6 8 - kΩ Notes: 1. Third harmonic typically exceeds other harmonics by 10dB. 2. Components are 100% tested at 3.25kVDC. 3. Caution: do not pass DC through windings. Telephone line current must be diverted using semiconductor line hold circuit or choke. 4. At signal levels greater than –20dBm, Lp will increase and Rp will decrease slightly but the effect is usually favourable to the return loss characteristic. 5. Return loss and transhybrid loss can be improved to 30dB in improved matching circuit. The values shown relate to the simplest configuration, Fig. 2. ETALDOC 597/4 Equiva lent C ircuit Fig . 1 Page 2 of 5 ½ L ½ L IDEAL 1:1 September 2000 P3324 MATCHING RECOMMENDATIONS The following recommendations start with the simplest implementations and progress to enhanced performance utilizing additional components. Good performance is achieved even with the simplest configurations. The implementations assume a low impedance balanced TX drive and a relatively high impedance RX input, as is commonly available, though use with other TX/RX arrangements is straightforward. Note that there are no changes to components on the line side, or in the hybrid, whether 600Ω or complex reference impedance selected, thus assisting country configuration. For complex impedance, the matching circuits derived are suitable for reference impedances of the type 270 + 750//150nF e.g. European CTR21 and 220 + 820//120nF (or 115nF) e.g. Australia, South Africa, etc., and yield similar performance characteristics. For other impedances, please contact ETAL. Minimum Cost Implementations 600 Ω C o m p le x Europ e a n C TR21/(Austra lia , etc .) Fig . 2 Fig. 3 4.7µF 600 270 (220) 560 150nF (120nF) 100nF* + 4.7µ F 100 TXA1 TXA1 820 750 (820) RXA LINE RXA LINE TXA2 TXA2 *Note: 100nF capacitor should have a temperature stable dielectric +Note: 2.2 µ F capacitor may be acceptable Insertion Loss: 1.3dB @ 2kHz Frequency Response : ±0.5dB 200Hz – 4kHz Return Loss: 18dB 200Hz – 4kHz Transhybrid Loss: 14dB 200Hz – 4kHz Insertion Loss: 2.2dB @ 2kHz Frequency Response : ±0.1dB 200Hz – 10kHz Return Loss: 18dB 200Hz – 4kHz Transhybrid Loss: 22dB 200Hz – 4kHz Improved matching and hybrid 600 Ω C o m p le x Europ e a n C TR21/(Austra lia , etc .) Fig . 4 Fig. 5 600 4.7µ F 270 (220) 560 150nF (120nF) 4.7µ F TXA1 750 (820) RXA 10nF 10k 120 TXA1 1k LINE 100nF* + 1nF LINE 1k 750 10nF 10k RXA 1nF TXA2 TXA2 *Note: 100nF capacitor should have a temperature stable dielectric +Note: Insertion Loss (Line to RXA): 3.2dB @ 2kHz Frequency Response : ±0.1dB 200Hz – 10kHz Return Loss: 20dB 200Hz – 4kHz Transhybrid Loss: 30dB 200Hz – 10kHz 2.2 µ F capacitor may be acceptable Insertion Loss (Line to RXA): 2.5dB @ 2kHz Frequency Response : ±0.5dB 200Hz – 4kHz Return Loss: 20dB 200Hz – 4kHz Transhybrid Loss: 18dB 200Hz – 4kHz Patented ETALDOC 597/4 Page 3 of 5 September 2000 P3324 600Ω Instrumentation 600 Ω Fig . 6 47 µF* 6.8nF 600 Ω 47µF* 6.8nF 600 Ω * If no DC block required, one of these capacitors can be removed and the other set to 22µ F, or, if preferred, both capacitors can be eliminated. Insertion Loss: 1.8dB @ 2kHz Frequency Response : ±0.2dB 50Hz – 20kHz Return Loss: 16dB 20Hz – 20kHz CONSTRUCTION Connections Dimensions Dimensions shown are in millimetres (inches). Geometric centres of outline and pin grid coincide within a tolerance circle of 0.6mmØ. Windings may be used interchangeably as primary or secondary. Total weight typically 5.2g. ETALDOC 597/4 Page 4 of 5 September 2000 P3324 SAFETY ABSOLUTE MAXIMUM RATINGS Constructed in accordance with IEC 950:1991, EN 60950:1992 (BS7002:1992), supplementary insulation, 250Vrms maximum working voltage, flammability class V-0. There are no special installation requirements (beyond attending to usual PCB track separations) since the integral cover provides supplementary insulation from its external faces to internal core and windings. CERTIFICATION (Ratings of components independent of circuit). Short term isolation voltage (1s) DC current Storage temperature Lead temperature, 10s 2.12kVrms, 3.0 kVDC 100µA -40OC to +85OC 260OC COPYRIGHT Certified under the IEC CB scheme (Certificate GB445W) to IEC 950:1991, up to amendment 4, subclauses 1.5, 1.5.1, 1.5.3, 2.2, 2.2.3, 2.2.4, 2.9.2, 2.9.3, 2.9.4, 4.4, 4.4.3.2 (class V-0) and 5.3 for a maximum working voltage of 250Vrms, nominal mains supply voltage not exceeding 300Vrms and a maximum operating temperature of 70OC in Pollution Degree 2 environments. Recognized under the Component Recognition Program of Underwriters Laboratories Inc. to US and Canadian requirements CAN/CSA C22.2 No. 950-95/UL1950, Third Edition, including revisions through to revision date March 1, 1998, based on Fourth Amendment of IEC 950, Second Edition, maximum working voltage 180Vrms (creepage), 420V peak (clearance), Pollution Degree 2, supplementary insulation. UL File number E203175. Approved and certified by BABT to EN 60950 and EN 41003. BABT Certificate of Recognition 608755 ETAL and P3324 are Trade Marks of Profec Technologies Ltd. The Trade Mark ETAL is registered at the UK Trade Marks Registry. Profec Technologies Ltd. is the owner of the design right under the Copyright Designs and Patents Act 1988 and no rights or licences are hereby granted or implied to any third party. P3324 design and construction are protected by patents and registered design. British Patent No. 2333646. British Patent No. 2340667. UK Registered Design No. 2077360. French Registered Design No. 991512. Germany Registered Design 49902311.0. United States Registered Design 426, 815. Other patents and registered designs pending. © 1998 - 2000 Profec Technologies Ltd. Reproduction prohibited. Additionally, ETAL certifies all transformers as providing voltage isolation of 2.12kVrms, 3kV DC minimum. All shipments are supported by a certificate of conformity to current applicable safety standards. Patented ISO 9001 FM 25326 Profec Technologies Ltd., 10 Betts Avenue, Martlesham Heath, Ipswich, IP5 3RH, England Telephone: +44 (0) 1473 611422 Fax: +44 (0) 1473 611919 Websites: www.etal.ltd.uk www.profec.com Email: [email protected] [email protected] ETALDOC 597/4 Page 5 of 5 September 2000